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Resting state MRI

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https://www.readbyqxmd.com/read/29230170/the-dancing-brain-structural-and-functional-signatures-of-expert-dance-training
#1
Agnieszka Z Burzynska, Karolina Finc, Brittany K Taylor, Anya M Knecht, Arthur F Kramer
Dance - as a ritual, therapy, and leisure activity - has been known for thousands of years. Today, dance is increasingly used as therapy for cognitive and neurological disorders such as dementia and Parkinson's disease. Surprisingly, the effects of dance training on the healthy young brain are not well understood despite the necessity of such information for planning successful clinical interventions. Therefore, this study examined actively performing, expert-level trained college students as a model of long-term exposure to dance training...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29228862/oculomotor-cognitive-control-abnormalities-in-australian-rules-football-players-with-a-history-of-concussion
#2
Meaghan Clough, Steven Mutimer, David K Wright, Adrian Tsang, Daniel Costello, Andrew Gardner, Peter Stanwell, Richelle Mychasiuk, Mujun Sun, Rhys D Brady, Stuart John McDonald, Kyria Maree Webster, Maddison Johnstone, Joanne Fielding, Bridgette Semple, Denes V Agoston, Owen B White, Richard Frayne, Terence John O'Brien, Sandy Richard Shultz
This study used oculomotor, cognitive, and multimodal magnetic resonance imaging (MRI) measures to assess for neurological abnormalities in current asymptomatic amateur Australian rules footballers (i.e., Australia's most participated collision sport) with a history of sports-related concussion (SRC). Participants were 15 male amateur Australian rules football players with a history of SRC greater than 6 months previously, and 15 sex-, age- and education-matched athlete control subjects that had no history of neurotrauma or participation in collision sports...
December 11, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29227002/cerebral-sex-dimorphism-and-sexual-orientation
#3
Amirhossein Manzouri, Ivanka Savic
The neurobiology of sexual orientation is frequently discussed in terms of cerebral sex dimorphism (defining both functional and structural sex differences). Yet, the information about possible cerebral differences between sex-matched homo and heterosexual persons is limited, particularly among women. In this multimodal MRI study, we addressed these issues by investigating possible cerebral differences between homo and heterosexual persons, and by asking whether there is any sex difference in this aspect. Measurements of cortical thickness (Cth), subcortical volumes, and functional and structural resting-state connections among 40 heterosexual males (HeM) and 40 heterosexual females (HeF) were compared with those of 30 homosexual males (HoM) and 30 homosexual females (HoF)...
December 11, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29226700/retrospective-correction-of-physiological-noise-impact-on-sensitivity-specificity-and-reproducibility-of-resting-state-functional-connectivity-in-a-reading-network-model
#4
Venkatagiri Krishnamurthy, Lisa C Krishnamurthy, Dina M Schwam, Ashley Ealey, Jaemin Shin, Daphne Greenberg, Robin D Morris
It is well accepted that physiological noise (PN) obscures the detection of neural fluctuations in resting-state functional connectivity (rsFC) MRI. However, a clear consensus for an optimal PN correction (PNC) methodology and how it can impact the rsFC signal characteristics is still lacking. In this study, we probe the impact of three PNC methods: RETROICOR: (Glover, et al. 2000), ANATICOR: (Jo, et al. 2010), and RVTMBPM: (Bianciardi, et al. 2009). Using a reading network model, we systematically explore the effects of PNC optimization on sensitivity, specificity, and reproducibility of rsFC signals...
December 10, 2017: Brain Connectivity
https://www.readbyqxmd.com/read/29226689/simultaneous-multi-slice-resting-state-fmri-at-3-tesla-slice-acceleration-related-biases-in-physiological-effects
#5
Ali M Golestani, Zahra Faraji-Dana, M Aras Kayvanrad, Kawin Setsompop, Simon Graham, J Jean Chen
Simultaneous multi-slice echo-planar imaging (EPI) can enhance the spatiotemporal resolution of resting-state functional MRI (rs-fMRI) by encoding and simultaneously imaging "groups" of slices. However, phenomena including respiration, cardiac pulsatility, respiration volume per time (RVT) and cardiac-rate variation (CRV), referred to as "physiological processes", impact SMS-EPI rs-fMRI in a manner that has yet to be well characterized. In particular, physiological noise may incur aliasing and introduce spurious signals from one slice into another within the "slice-group" in rs-fMRI data, resulting in a deleterious effect on resting-state functional connectivity MRI (rs-fcMRI) maps...
December 10, 2017: Brain Connectivity
https://www.readbyqxmd.com/read/29226283/improving-functional-mri-registration-using-whole-brain-functional-correlation-tensors
#6
Yujia Zhou, Pew-Thian Yap, Han Zhang, Lichi Zhang, Qianjin Feng, Dinggang Shen
Population studies of brain function with resting-state functional magnetic resonance imaging (rs-fMRI) largely rely on the accurate inter-subject registration of functional areas. This is typically achieved through registration of the corresponding T1-weighted MR images with more structural details. However, accumulating evidence has suggested that such strategy cannot well-align functional regions which are not necessarily confined by the anatomical boundaries defined by the T1-weighted MR images. To mitigate this problem, various registration algorithms based directly on rs-fMRI data have been developed, most of which have utilized functional connectivity (FC) as features for registration...
September 2017: Medical Image Computing and Computer-assisted Intervention: MICCAI ..
https://www.readbyqxmd.com/read/29215142/cortical-thickness-resting-state-heart-rate-and-heart-rate-variability-in-female-adolescents
#7
Julian Koenig, Peter Parzer, Corinna Reichl, Ayaka Ando, Julian F Thayer, Romuald Brunner, Michael Kaess
Resting state heart rate variability (HRV) is a psychophysiological marker that has gained increasing research interest, in particular in developmental neuroscience. HRV has been shown to be associated with mental and physical health, beyond simple measures of heart rate (HR) and shows inter- and intraindividual variance across aging. Recently, three studies reported on a positive correlation between resting state HRV and cortical thickness in selected regions of interest (ROIs) in adult samples. Structural thickness, HRV, and HR change during the sensitive period of adolescence...
December 7, 2017: Psychophysiology
https://www.readbyqxmd.com/read/29209238/disrupted-control-related-functional-brain-networks-in-drug-naive-children-with-attention-deficit-hyperactivity-disorder
#8
Jiejie Tao, Xueyan Jiang, Xin Wang, Huiru Liu, Andan Qian, Chuang Yang, Hong Chen, Jiance Li, Qiong Ye, Jinhui Wang, Meihao Wang
Attention-deficit/hyperactivity disorder (ADHD) is a common neurodevelopmental disease featuring executive control deficits as a prominent neuropsychological trait. Executive functions are implicated in multiple sub-networks of the brain; however, few studies examine these sub-networks as a whole in ADHD. By combining resting-state functional MRI and graph-based approaches, we systematically investigated functional connectivity patterns among four control-related networks, including the frontoparietal network (FPN), cingulo-opercular network, cerebellar network, and default mode network (DMN), in 46 drug-naive children with ADHD and 31 age-, gender-, and intelligence quotient-matched healthy controls (HCs)...
2017: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/29208569/a-digital-3d-atlas-of-the-marmoset-brain-based-on-multi-modal-mri
#9
Cirong Liu, Frank Q Ye, Cecil Chern-Chyi Yen, John D Newman, Daniel Glen, David A Leopold, Afonso C Silva
The common marmoset (Callithrix jacchus) is a New-World monkey of growing interest in neuroscience. Magnetic resonance imaging (MRI) is an essential tool to unveil the anatomical and functional organization of the marmoset brain. To facilitate identification of regions of interest, it is desirable to register MR images to an atlas of the brain. However, currently available atlases of the marmoset brain are mainly based on 2D histological data, which are difficult to apply to 3D imaging techniques. Here, we constructed a 3D digital atlas based on high-resolution ex-vivo MRI images, including magnetization transfer ratio (a T1-like contrast), T2w images, and multi-shell diffusion MRI...
December 2, 2017: NeuroImage
https://www.readbyqxmd.com/read/29202647/swallow-presyncope-in-an-athletic-patient-caused-by-third-degree-atrioventricular-block
#10
Axel Van Damme, Tine De Backer, Philippe Vanderheeren
Introduction Swallow syncope is a neurally mediated syncope. Multiple causes have been described in literature. A rare cause is arrhythmias. Only a limited amount of cases present the association of swallow syncope and third degree AV-block. Case presentation A 39-year-old man presented with episodes of presyncope while eating. Further medical history, physical examination, resting 12-lead ECG, cyclo-ergometry, transthoracic echocardiography and MRI of the heart were normal. 24 h Holter monitoring demonstrated high-grade third-degree atrioventricular (AV) block...
December 5, 2017: Acta Clinica Belgica
https://www.readbyqxmd.com/read/29200859/abnormal-regional-spontaneous-neural-activity-in-visual-pathway-in-retinal-detachment-patients-a-resting-state-functional-mri-study
#11
Xin Huang, Dan Li, Hai-Jun Li, Yu-Lin Zhong, Shelby Freeberg, Jing Bao, Xian-Jun Zeng, Yi Shao
Objective: The aim of the study was to investigate changes of brain neural homogeneity in retinal detachment (RD) patients using the regional homogeneity (ReHo) method to understand their relationships with clinical features. Materials and methods: A total of 30 patients with RD (16 men and 14 women), and 30 healthy controls (HCs) (16 men and 14 women) closely matched in age and sex were recruited. Resting-state functional magnetic resonance imaging scans were performed for all subjects...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/29200180/procedural-pain-and-oral-glucose-in-preterm-neonates-brain-development-and-sex-specific-effects
#12
Juliane Schneider, Emma G Duerden, Ting Guo, Karin Ng, Patric Hagmann, Myriam Bickle Graz, Ruth E Grunau, M Mallar Chakravarty, Petra S Hüppi, Anita C Truttmann, Steven P Miller
Our objectives were to determine whether procedural pain and glucose exposure are associated with altered structural and functional brain development differently in preterm males and females, and neurodevelopment at 18-months corrected age. Fifty-one very-preterm neonates (22 males; median[IQR] gestational age 27.6[2.0] weeks) underwent three serial scans including T1-weighted and resting-state functional magnetic resonance imaging (MRI) at median postmenstrual weeks: 29.4, 31.9, and 41.1. Thalamus, basal ganglia, and total brain volumes were segmented...
December 1, 2017: Pain
https://www.readbyqxmd.com/read/29198588/how-much-is-enough-can-resting-state-fmri-provide-a-demarcation-for-neurosurgical-resection-in-glioma
#13
REVIEW
Diana C Ghinda, Jin-Song Wu, Niall W Duncan, Georg Northoff
This study represents a systematic review of the insights provided by resting state functional MRI (rs-fMRI) use in the glioma population. Following PRISMA guidelines, 45 studies were included in the review and were classified in glioma-related neuronal changes (n=28) and eloquent area localization (n=17). Despite the heterogeneous nature of the studies, there is considerable evidence of diffuse functional reorganization occurring in the setting of gliomas with local and interhemispheric functional connectivity alterations involving different functional networks...
November 30, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/29196699/altered-resting-state-brain-activity-in-parkinson-s-disease-patients-with-freezing-of-gait
#14
Tao-Mian Mi, Shan-Shan Mei, Pei-Peng Liang, Lin-Lin Gao, Kun-Cheng Li, Tao Wu, Piu Chan
Freezing of gait (FOG) is a common and debilitating symptom in Parkinson's disease (PD). The current study investigated alterations of resting-state spontaneous brain activity in PD patients with FOG. A total of 29 patients with FOG, 28 patients without FOG and 31 controls were included. All subjects underwent resting-state functional MRI, and the amplitude of low-frequency fluctuation (ALFF) was calculated to measure the spontaneous brain activity. Between-group differences and correlations with FOG severity (both subjective and objective measures) were analyzed...
December 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29196686/resting-state-functional-mri-reveals-altered-brain-connectivity-and-its-correlation-with-motor-dysfunction-in-a-mouse-model-of-huntington-s-disease
#15
Qiang Li, Gang Li, Dan Wu, Hanbing Lu, Zhipeng Hou, Christopher A Ross, Yihong Yang, Jiangyang Zhang, Wenzhen Duan
Huntington's disease (HD) is an autosomal dominant inherited neurodegenerative disorder, and no cure is available currently. Treatment of HD is likely to be most beneficial in the early, possibly pre-manifestation stage. The challenge is to determine the best time for intervention and evaluate putative efficacy in the absence of clinical symptoms. Resting-state functional MRI may represent a promising tool to develop biomarker reflecting early neuronal dysfunction in HD brain, because it can examine multiple brain networks without confounding effects of cognitive ability, which makes the resting-state fMRI promising as a translational bridge between preclinical study in animal models and clinical findings in HD patients...
December 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29188492/investigating-the-effects-of-subconcussion-on-functional-connectivity-using-mass-univariate-and-multivariate-approaches
#16
Bryson B Reynolds, Amanda N Stanton, Sauson Soldozy, Howard P Goodkin, Max Wintermark, T Jason Druzgal
There are concerns about the effects of subconcussive head impacts in sport, but the effects of subconcussion on brain connectivity are not well understood. We hypothesized that college football players experience changes in brain functional connectivity not found in athletes competing in lower impact sports or healthy controls. These changes may be spatially heterogeneous across participants, requiring analysis methods that go beyond mass-univariate approaches commonly used in functional MRI (fMRI). To test this hypothesis, we analyzed resting-state fMRI data from college football (n = 15), soccer (n = 12), and lacrosse players (n = 16), and controls (n = 29) collected at preseason and postseason time points...
November 29, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29182621/exploring-the-reproducibility-of-functional-connectivity-alterations-in-parkinson-s-disease
#17
Liviu Badea, Mihaela Onu, Tao Wu, Adina Roceanu, Ovidiu Bajenaru
Since anatomic MRI is presently not able to directly discern neuronal loss in Parkinson's Disease (PD), studying the associated functional connectivity (FC) changes seems a promising approach toward developing non-invasive and non-radioactive neuroimaging markers for this disease. While several groups have reported such FC changes in PD, there are also significant discrepancies between studies. Investigating the reproducibility of PD-related FC changes on independent datasets is therefore of crucial importance...
2017: PloS One
https://www.readbyqxmd.com/read/29179629/spinal-cord-injury-disrupts-resting-state-networks-in-the-human-brain
#18
Ammar Hawasli, Jerrel Rutlin, Jarod L Roland, Rory Murphy, Sheng-Kwei Song, Eric Leuthardt, Joshua Shimony, Wilson Z Ray
Despite 253,000 spinal cord injury (SCI) patients in America, little is known about how SCI affects brain networks. Spinal magnetic resonance imaging (MRI) provides only structural information with no insight into functional connectivity. Resting-state functional MRI (RS-fMRI) quantifies network connectivity through the identification of resting-state networks (RSNs) and allows detection of functionally-relevant changes during disease. Given the robust network of spinal cord afferents to the brain, we hypothesized SCI produces meaningful changes in brain RSNs...
November 27, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29175200/quasi-periodic-patterns-of-intrinsic-brain-activity-in-individuals-and-their-relationship-to-global-signal
#19
Behnaz Yousefi, Jaemin Shin, Eric H Schumacher, Shella D Keilholz
Quasiperiodic patterns (QPPs) as reported by Majeed et al., 2011 are prominent features of the brain's intrinsic activity that involve important large-scale networks (default mode, DMN; task positive, TPN) and are likely to be major contributors to widely used measures of functional connectivity. We examined the variability of these patterns in 470 individuals from the Human Connectome Project resting state functional MRI dataset. The QPPs from individuals can be coarsely categorized into two types: one where strong anti-correlation between the DMN and TPN is present, and another where most areas are strongly correlated...
November 21, 2017: NeuroImage
https://www.readbyqxmd.com/read/29171429/age-related-connectivity-differences-between-attention-deficit-and-hyperactivity-disorder-patients-and-typically-developing-subjects-a-resting-state-functional-mri-study
#20
Jisu Hong, Bo-Yong Park, Hwan-Ho Cho, Hyunjin Park
Attention deficit and hyperactivity disorder (ADHD) is a disorder characterized by behavioral symptoms including hyperactivity/impulsivity among children, adolescents, and adults. These ADHD related symptoms are influenced by the complex interaction of brain networks which were under explored. We explored age-related brain network differences between ADHD patients and typically developing (TD) subjects using resting state fMRI (rs-fMRI) for three age groups of children, adolescents, and adults. We collected rs-fMRI data from 184 individuals (27 ADHD children and 31 TD children; 32 ADHD adolescents and 32 TD adolescents; and 31 ADHD adults and 31 TD adults)...
October 2017: Neural Regeneration Research
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